Perry was supposed to appear in a Sept. 27, 2010, episode of "Sesame Street" singing a version of her hit song "Hot n Cold" to Elmo, but the segment was pulled and instead put online after parents complained about her outfit.

Perry later made light of the controversy with an appearance on "Saturday Night Live" in a low-cut Elmo shirt.

Perry released her own fragrance, Purr, in November 2010.

Katy Perry performs during the Victoria's Secret Fashion Show at the Lexington Armory in New York City on Nov. 10, 2010.

Katy Perry performs during the Z100 Jingle Ball in New York City on Dec. 10, 2010.

Perry voiced a role as herself in an episode of "The Simpsons" that ran Dec. 5, 2010. She's seen here in a promotional photo session for the show.

Katy Perry sings during a taped rehearsal for the Grammy nominations television special in Los Angeles on Nov. 30, 2010.

Perry guest starred in a Season 6 episode of "How I Met Your Mother" titled "Oh, Honey" that ran on Feb. 7, 2011.

Katy Perry arrives at the 29th Annual ASCAP Pop Music Awards in Hollywood, Calif., on April 18, 2012.

On June 5, 2012, Electronic Arts released "The Sims 3: Katy Perry's Sweet Treats." The game is set around her candy-themed franchise with candy-themed objects, styles, clothes, hair, patterns and more.

Perry arrives at the Australian premiere of "Part of Me" in Sydney on June 30, 2012.

Katy Perry poses at the premiere of "Katy Perry: Part of Me" at the Grauman's Chinese theatre in Hollywood, Calif., on June 26, 2012.

Katy Perry performs at the premiere of "Katy Perry: Part of Me" at the Grauman's Chinese theatre in Hollywood, Calif., on June 26, 2012.

The 3D documentary concert film opened on July 5, 2012, and made about $32.2 million worldwide.

Perry performs at the Kids Inaugural Concert for Children and Military Families, one of the events ahead of the second-term inauguration of President Barack Obama, on Jan. 19, 2013, in Washington, D.C.

Perry performs with a member of her band during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas on Sept. 20, 2013.

Perry's fourth studio album, "Prism," was released on Oct. 18, 2013. The album's first single, "Roar," was released in August 2013 and climbed to the top of the U.S. Billboard Hot 100 chart and peaked in the top 10 in 25 different countries.

Perry arrives at the 41st American Music Awards in Los Angeles on Nov. 24, 2013.

Perry arrives at the NRJ Music Awards in Cannes, France, on Dec. 14, 2013.

Perry attends "The Night That Changed America: A Grammy Salute To The Beatles" in Los Angeles on Jan. 27, 2014.

Perry tweeted this selfie she took with Vice President Joe Biden in June 2014.

Perry performs at a concert commemorating the Special Olympics at the White House in Washington, D.C., on July 31, 2014.

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